[AST] Remove unused function removeLocalCVRQualifiers

The last use was removed by:

  commit 0eb06cb
  Author: Roy Jacobson <roi.jacobson1@gmail.com>
  Date:   Tue Mar 14 21:25:54 2023 +0200

Differential Revision: https://reviews.llvm.org/D151607

clang/include/clang/AST/Type.h

@@ -948,7 +948,6 @@ class QualType {
   void removeLocalConst();
   void removeLocalVolatile();
   void removeLocalRestrict();
-  void removeLocalCVRQualifiers(unsigned Mask);
 
   void removeLocalFastQualifiers() { Value.setInt(0); }
   void removeLocalFastQualifiers(unsigned Mask) {
@@ -6781,15 +6780,6 @@ inline void QualType::removeLocalVolatile() {
   removeLocalFastQualifiers(Qualifiers::Volatile);
 }
 
-inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
-  assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits");
-  static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
-                "Fast bits differ from CVR bits!");
-
-  // Fast path: we don't need to touch the slow qualifiers.
-  removeLocalFastQualifiers(Mask);
-}
-
 /// Check if this type has any address space qualifier.
 inline bool QualType::hasAddressSpace() const {
   return getQualifiers().hasAddressSpace();